Method of making car parts.



W. D. PORSYTH. METHOD OF MAKING CAR PARTS.

APPLICATION FILED JULY 30,1914.

Patented J an. 19, 1915.

' Zzzeaaea:

WILLIAM D. FORSYTH, OF YOUNGSTOWN, OHIO, ASSIGNOB, T RAILWAY PRODUCTS CORPORATION, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YO! mn'rnonor MAKING can PARTS.

Specification of Letters Patent.

Patented J an. 19, 11915.

original application filed December 4, 1913, Serial No. 804,676. Divided and this application filed July 30,

1914. Serial No. 854,021.

To aZZ whom it may concern:

Be it known that I, WILLIAM D. FoRsY'rH, a citizen of the United States, and a resident of Youngstown, in the county of Mahoning and State of Ohio, have invented new and useful Improvements in Methods of Making Car Parts, of which the following is a specification.

My invention relates to the parts of railway cars, such as bolsters, truck side frames, brake beams, and the like.

Theprincipal objectof my invention is to provide a method of making a car part from a metal plate which will be easy and cheap to practise, and which will produce a light and strong car part.

In the accompanying drawing which forms part of this specification, .and in which like reference characters refer to like parts throughout the several views, Figure 1 is an end elevation of the blank from which a car part is madeaccording to my invention, said blank being in the form of a slitted metal plate; Fig. 2 is a plan view of the blank shown in Fig. 1, showing the slits therein; Fig. 3 is a cross-section on the line 33 on Fig. 4; Fig. 4 is a plan view of the blank after flanges have been formed along its edges and certain parts have been displaced from its plane; Fig. 5 is a crosssection on the line 55 on Fig. 6; Fig. 6 is a sideelevation of the blank after the middle portion thereof between the slits has been stretched and displaced from the remaining portions of the blank; Fig. 7 is an end elevation of the blank after its side portions have been bent -up to form the finished truss member; and Fig. 8 is-a side elevation of the finished truss member.

In making the car truck side frame shown in the accompanying drawing, the blank 1 is formed by cutting off the corners of an oblong metal plate along straight or curved lines 2, as shown in Fig. 2. After the corners of the blank 1 are cut oil", spaced slits 3 are made in said blank. These slits 3 extend longitudinally of the blank 1 and terminate short of its ends. These slits 3 are shown as having'their middle portions parallel and their end portions converging; but they may be curved or otherwise shaped according to the proportions of the finished car part desired. he intermediate portion of the blank 1 is divided by the slits 3 into three longitudinal portions consisting of two side portions 4: and a middle ortion 5. The side 'portions 4 and the middle portions 5 are mtegral with the end portions 6 of the blank 1.

The longitudinal edge portions of the blank 1 are bent along lines parallel to its longitudinal edges to. form flanges 7 projecting from said blank in the same direction. The flanges 7 may be formed before the blank 1 is slitted, in order that the flanging operation will not spread the slits. The longitudinal edge portions of the middle portion 5 are bent along parallel lines 8 passing through the ends of the slits 3 to form flanges 9 which project from the blank 1 in a direction opposite to the direction in which the flanges 7 project. The middle portion 5 of the blank 1, together with its anges 9, is stretched and displaced from the plane of the end portions6 in a direction perpendicular to the plane of saidblank, as

shown in Fig. 6, that is, perpendicular to its own plane. The middle portion 5 of the blank 1, after it has been stretched and displaced, as described, has a middle straight-portion 11 which is in a plane substantially parallel to the plane of the end portions 6 of the blank 1, and two straight portions 10 and 12 which incline upwardly from the ends of said middle straight portion 11 to the end portions 6. The middle portion 5 of blank 1 is of uniform width,

and the flanges 9 thereon are widest throughout its middle region.

After the middle portion 5 of the blank .1 has been displaced, as described, (Fig.

6), the side portions 4: with the flanges 7 thereon are bent along parallel lines 13 which extend longitudinally pf the blank 1, so that the flanges 7 project'toward each other, as shown in Figs. 7 and 8. These operations described 've the truss member its finished form in w 'ch' there is an opening 14:. In the opening 14 is fixed a tie or strut member, not shown, to make a complete king-post truss.-

The construction of the car part is claimed in my applicationSer. No. 804,676, filed December 4th, 1913, of which this applica tion is a divisional.

The method hereinbefore described produces a truss member which constitutes the tension and compression members of a kingpost truss and is adapted for a car part.

The different bending or pressing operations of the method may be performed by suitable dies, presses or other apparatus, and while the plate is cold or hot. I

In practising the method, the shape of the original plate, the shape of the slits and the lines of bending may be varied so that the metal may be distributed throughout the finished truss member as desired. The truss member shown as made according to the invention is designed for a car truck side frame, and the metal is distributed in said truss member according to the stresses existing in a side frame. In the case of bolsters, brake beams or other car parts, however, other conditions may require a different distribution of metal than that shown;

but the necessary changes. can be, easily made.

What I claimas my invention is:

1. A blank for making a car part comprising a plate, said plate being cut by two spaced slits extending longitudinally thereof and terminating short at its ends, said slits having their ends closer together than their middle portions,.saidplate being narrowest at its ends and of full Width near the ends of said slits.

2. A blank for makin a car part comprising a plate, the longitudinal edge porti ons of said plate being bent to form flanges along the longitudinal edges ofsaid plate,

said plate being cut by two spaced slits extending longitudinally thereof and terminating short of its ends, said slits having their ends closer together than their intermediate portions, the longitudinal edge portions of the middle portion of said plate included between said slits being bent along straight lines between the ends of said slits to project from the plane of said plate at right angles thereto, whereby integral rojecting flanges areformed on said mi dle portion of-said slits.

3. A blank for making a-car part comprising a plate cut by two spaced slits extending longitudinally thereof and terminating short of its ends, -said slits having their ends closer together than their intermediate portions.

v blank for making a car part compris ng a plate cut by two spaced slits plate included between said extending longitudinally thereof and terminating-short of'its ends, said slits having.

thereto, whereby integral projecting flanges are formed on said middle portion of said plate included between said slits.

5. The method of making car parts which consists in cutting two spaced slits in a plate, said slits extending longitudinally of said plate and terminating short of its ends, bending the longitudinal edge portions of the middle portion of said plate included between said slits to form flanges along the longitudinal edges of said plate, dis-.

placing said middle portion included between said slits from its plane in a direction perpendicular to its plane, and bending the side portions of said plate along lines extending longitudinally of said plate to lie in parallel planes.

6. The method of making car parts which consists in bending the longitudinal edge portions of a plate to form flanges along the longitudinal edges of said plate, cutting two spaced slits in said plate, said slits extending longitudinally of said plate and terminating short of its ends, bendin the longitudinal edge' portions of the middle portion of said plate included between said slits to form flanges thereon, displacing said middle portion included between said slits from its plane in a direction perpendicular to its plane, and bendingthe side'portions of said plate along lines extending longitudinally of said plate to lie in parallel planes.

7. The improvement in the method of making car parts, which consists in flanging the longitudinal edges of a plate, cutting two spaced slits in said plate, said slits extending longitudinally of said plate and terminating short of its ends, bending the side portions of said plate along lines extendin longitudinally thereof to lie at substantia 1y right angles to,the original plane of the plate, and then displacing the middle portion of said plate included between said slits from the remainder of said plate in a direction perpendicular to the plane of said late. p 8. The method of making car parts'which consists in bending the longitudinal edge portions of a plate to form flanges along the longitudinal edges of said plate, cutting.

two spaced slits in said plate, said slits extending longitudinally of said late andterminating short of its ends, sai slits having their ends closer together than their intermediate portions, bending the longitudinal 1,125,,soo

between the ends of said slits to formv flanges on said middle portion, displacing said middle portion included between said slits from its plane ina direction perpendicular to its plane, and bending the side portions of said plate along lines extending longitudinally of said plate to lie in parallel planes.

Signed at Pittsburgh, Pennsylvania, this 25th day of July, 1914:.

WILLIAM D. FORSYTH. Witnesses:

JAMES F. CALLA AN, Amos H. Evans. 

